BB68 Square-Taper Bicycle Bottom Bracket, 68mm Shell

Replace a matching square-taper bicycle bottom bracket with a BB68 sealed-cartridge unit. Choose the axle length required by your crankset and a compatible 68 mm frame shell.

• ✅ Renew a matching crank support - the cartridge provides the bottom-bracket bearing assembly.
• ✅ Choose the axle length your drivetrain needs - five lengths cover different fit requirements.
• ✅ Keep the bearings enclosed - the sealed cartridge helps limit exposure to dirt.

Match the Shell and Axle to Your Drivetrain

A bottom bracket needs to suit both the bicycle frame and the crankset. Check the shell width, thread standard, square-taper compatibility and existing axle length before choosing a replacement.

The right axle length helps preserve the intended crank position and chainline. Use the correct bottom-bracket tools for removal and fitting, and confirm the manufacturer's installation requirements.

Technical details

• Model: BB68.
• Frame shell width: 68 mm.
• Interface: square taper.
• Material listed: steel.
• Axle options: 110, 118, 120, 122 or 127 mm.
• Sealed cartridge bearings.

Confirm the shell and axle measurements before selecting your replacement.